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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 879 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.2 + ? = 10
  2. 2.62 + ? = 100
  3. 3.31 + ? = 100
  4. 4.70 + ? = 100
  5. 5.3 + ? = 10
  6. 6.9 + ? = 10
  7. 7.30 + ? = 100
  8. 8.66 + ? = 100
  9. 9.89 + ? = 100
  10. 10.6 + ? = 10
  11. 11.14 + ? = 100
  12. 12.5 + ? = 10
  13. 13.1 + ? = 10
  14. 14.4 + ? = 10
  15. 15.71 + ? = 100
  16. 16.23 + ? = 100
  17. 17.19 + ? = 100
  18. 18.64 + ? = 100
  19. 19.80 + ? = 100
  20. 20.7 + ? = 10
  21. 21.36 + ? = 100
  22. 22.17 + ? = 100
  23. 23.39 + ? = 100
  24. 24.48 + ? = 100
  25. 25.87 + ? = 100
  26. 26.37 + ? = 100
  27. 27.49 + ? = 100
  28. 28.47 + ? = 100
  29. 29.61 + ? = 100
  30. 30.8 + ? = 10
  31. 31.54 + ? = 100
  32. 32.56 + ? = 100
  33. 33.47 + ? = 100
  34. 34.82 + ? = 100
  35. 35.45 + ? = 100
  36. 36.34 + ? = 100
  37. 37.52 + ? = 100
  38. 38.84 + ? = 100
  39. 39.65 + ? = 100
  40. 40.55 + ? = 100

Answer key

  1. 8
  2. 38
  3. 69
  4. 30
  5. 7
  6. 1
  7. 70
  8. 34
  9. 11
  10. 4
  11. 86
  12. 5
  13. 9
  14. 6
  15. 29
  16. 77
  17. 81
  18. 36
  19. 20
  20. 3
  21. 64
  22. 83
  23. 61
  24. 52
  25. 13
  26. 63
  27. 51
  28. 53
  29. 39
  30. 2
  31. 46
  32. 44
  33. 53
  34. 18
  35. 55
  36. 66
  37. 48
  38. 16
  39. 35
  40. 45

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